360-degree videos, also known as surround video, or immersive videos or spherical videos, are

video Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media. Video was first developed for mechanical television systems, which were quickly replaced by cathode-ray tube (CRT) sy ...

recordings where a view in every direction is recorded at the same time, shot using an

omnidirectional camera In photography, an omnidirectional camera (from "omni", meaning all), also known as 360-degree camera, is a camera having a field of view that covers approximately the entire sphere or at least a full circle in the horizontal plane. Omnidirection ...

or a collection of cameras. During playback on normal flat display the viewer has control of the viewing direction like a

panorama A panorama (formed from Greek πᾶν "all" + ὅραμα "view") is any wide-angle view or representation of a physical space, whether in painting, drawing, photography, film, seismic images, or 3D modeling. The word was originally coined i ...

. It can also be played on a display or projectors arranged in a sphere or some part of a sphere.

Creation

360-degree video is typically recorded using either a special rig of multiple cameras, or using a dedicated camera that contains multiple camera lenses embedded into the device, and recording overlapping angles simultaneously. Specialized

s and rigs have been developed for the purpose of recording 360-degree video, including rigs such as

GoPro GoPro, Inc. (marketed as GoPro and sometimes stylized as GoPRO) is an American technology company founded in 2002 by Nick Woodman. It manufactures action cameras and develops its own mobile apps and video-editing software. Founded as Woodman ...

's Omni and Odyssey (which consist of multiple

action camera An action camera or action cam is a digital camera designed for recording action while being immersed in it. Action cameras are therefore typically compact and rugged, and waterproof at surface-level. They typically use CMOS image sensors, and ...

s installed within a frame), and contained cameras like the

Nokia OZO Nokia OZO is providing leading audio software technologies for smartphone, tablet, laptop, and camera manufacturers. The offering covers both audio capture and playback solutions. OZO Audio utilizes pioneering spatial audio technology to capture ...

. There have also been handheld dual-lens cameras such as the Ricoh Theta S, Samsung Gear 360, Garmin VIRB 360, and the Kogeto Dot 360—a panoramic camera lens accessory for

smartphone A smartphone is a portable computer device that combines mobile telephone and computing functions into one unit. They are distinguished from feature phones by their stronger hardware capabilities and extensive mobile operating systems, whi ...

cameras A camera is an optical instrument that can capture an image. Most cameras can capture 2D images, with some more advanced models being able to capture 3D images. At a basic level, most cameras consist of sealed boxes (the camera body), with a ...

. This separate footage is stitched into one spherical video piece, and the color and contrast of each shot is calibrated to be consistent with the others. This process is done either by the camera itself, or using specialized software that can analyze common visuals and audio to synchronize and link the different camera feeds together. Generally, the only area that cannot be viewed is the view toward the camera support. 360-degree video is typically formatted in an

equirectangular projection The equirectangular projection (also called the equidistant cylindrical projection or la carte parallélogrammatique projection), and which includes the special case of the plate carrée projection (also called the geographic projection, lat/lon ...

and is either monoscopic, with one image directed to both eyes, or

stereoscopic Stereoscopy (also called stereoscopics, or stereo imaging) is a technique for creating or enhancing the illusion of depth in an image by means of stereopsis for binocular vision. The word ''stereoscopy'' derives . Any stereoscopic image is ...

, viewed as two distinct images directed individually to each eye for a 3D effect. Due to this projection and stitching, equirectangular video exhibits a lower quality in the middle of the image than at the top and bottom. Spherical videos are frequently in

curvilinear perspective Curvilinear perspective, also five-point perspective, is a graphical projection used to draw 3D objects on 2D surfaces. It was formally codified in 1968 by the artists and art historians André Barre and Albert Flocon in the book ''La Perspective c ...

with a fisheye effect. The heavy

barrel distortion In geometric optics, distortion is a deviation from rectilinear projection; a projection in which straight lines in a scene remain straight in an image. It is a form of optical aberration. Radial distortion Although distortion can be irre ...

often requires rectilinear correction before applications in detection, tracking or navigation. Some storytellers refer to 360-degree video that uses professional cinematic production techniques such as lighting design,

sound design Sound design is the art and practice of creating sound tracks for a variety of needs. It involves specifying, acquiring or creating auditory elements using audio production techniques and tools. It is employed in a variety of disciplines including ...

scenic design Scenic design (also known as scenography, stage design, or set design) is the creation of theatrical, as well as film or television scenery. Scenic designers come from a variety of artistic backgrounds, but in recent years, are mostly train ...

, and blocking techniques as cinematic virtual reality (or cine-VR for short).

Playback

360-degree videos are typically viewed via

personal computer A personal computer (PC) is a multi-purpose microcomputer whose size, capabilities, and price make it feasible for individual use. Personal computers are intended to be operated directly by an end user, rather than by a computer expert or te ...

mobile device A mobile device (or handheld computer) is a computer small enough to hold and operate in the hand. Mobile devices typically have a flat LCD or OLED screen, a touchscreen interface, and digital or physical buttons. They may also have a physica ...

s such as

s, or dedicated

head-mounted display A head-mounted display (HMD) is a display device, worn on the head or as part of a helmet (see Helmet-mounted display for aviation applications), that has a small display optic in front of one ( monocular HMD) or each eye ( binocular HMD). An ...

s. Users can pan around the video by clicking and dragging. On smartphones, internal sensors such as the

gyroscope A gyroscope (from Ancient Greek γῦρος ''gŷros'', "round" and σκοπέω ''skopéō'', "to look") is a device used for measuring or maintaining orientation and angular velocity. It is a spinning wheel or disc in which the axis of rot ...

can also be used to pan the video based on the orientation of the device. Taking advantage of this behavior,

stereoscope A stereoscope is a device for viewing a stereoscopic pair of separate images, depicting left-eye and right-eye views of the same scene, as a single three-dimensional image. A typical stereoscope provides each eye with a lens that makes the ima ...

-style enclosures for smartphones (such as Google Cardboard viewers and the

Samsung Gear VR The Samsung Gear VR is a virtual reality headset developed by Samsung Electronics, in collaboration with Oculus VR, and manufactured by Samsung. The headset was released on November 27, 2015. When in use, a compatible Samsung Galaxy device acts ...

) can be used to view 360-degree videos in an immersive format similar to

virtual reality Virtual reality (VR) is a simulated experience that employs pose tracking and 3D near-eye displays to give the user an immersive feel of a virtual world. Applications of virtual reality include entertainment (particularly video games), edu ...

. The phone display is viewed through lenses contained within the enclosure, as opposed to virtual reality headsets that contain their own dedicated displays.

Publishing

In March 2015,

YouTube YouTube is a global online video sharing and social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by Google, and is the second mo ...

launched support for publishing and viewing 360-degree videos, with playback on its website and its Android

mobile app A mobile application or app is a computer program or software application designed to run on a mobile device such as a phone, tablet, or watch. Mobile applications often stand in contrast to desktop applications which are designed to run on d ...

s. Parent company

Google Google LLC () is an American Multinational corporation, multinational technology company focusing on Search Engine, search engine technology, online advertising, cloud computing, software, computer software, quantum computing, e-commerce, ar ...

also announced that it would collaborate with camera manufacturers to make it easier for creators to upload 360-degree content recorded with their products to YouTube. However, in 2017, Google and YouTube began to promote an alternative monoscopic or stereoscopic video format known as VR180, which is limited to a 180-degree field of view, but is promoted as being more accessible to produce than 360-degree video, and allowing more depth to be maintained by not subjecting the video to equirectangular projection

Facebook Facebook is an online social media and social networking service owned by American company Meta Platforms. Founded in 2004 by Mark Zuckerberg with fellow Harvard College students and roommates Eduardo Saverin, Andrew McCollum, Dust ...

(parent company of VR headset maker

Oculus VR Reality Labs is a business of Meta Platforms (formerly Facebook Inc.) that produces virtual reality (VR) and augmented reality (AR) hardware and software, including virtual reality headsets such as Quest, and online platforms such as Horizon ...

) followed suit by adding 360-degree video support in September 2015, and subsequently unveiled reference designs for its own 360-degree camera systems known as Facebook Surround 360. Facebook announced in March 2017 that more than 1 million 360-degree videos had been uploaded to Facebook to date.

Vimeo Vimeo, Inc. () is an American video hosting, sharing, and services platform provider headquartered in New York City. Vimeo focuses on the delivery of high-definition video across a range of devices. Vimeo's business model is through software as ...

also launched 360-degree video support in March 2017. Google Cardboard, which is typically distributed in the form of do-it-yourself kits consisting of low-cost materials and components, has been credited with helping virtual reality become more readily available to the general public, and helping boost the adoption of 360-degree video by publishers, such as mainstream journalists and media brands. The use of the term "virtual reality" to describe 360-degree video has been disputed, as VR typically refers to interactive experiences wherein the viewer's motions can be tracked to allow real-time interactions within a virtual environment, with orientation and position tracking. In 360-degree video, the locations of viewers are fixed, viewers are limited to the angles captured by the cameras, and cannot interact with the environment. The non-dynamic nature of video also means that rendering techniques cannot be used to reduce the risk of

motion sickness Motion sickness occurs due to a difference between actual and expected motion. Symptoms commonly include nausea, vomiting, cold sweat, headache, dizziness, tiredness, loss of appetite, and increased salivation. Complications may rarely include de ...

Variations

* 6DOF video: stereoscopic 360-degree video which also captures depth and allows for

six degrees of freedom Six degrees of freedom (6DOF) refers to the six mechanical degrees of freedom of movement of a rigid body in three-dimensional space. Specifically, the body is free to change position as forward/backward (surge), up/down (heave), left/right ...

in navigation within the captured environment * Volumetric video

References

External links

How do I make 360 videos?
by

BBC Academy The BBC Academy is an educational arm of the British Broadcasting Corporation which trains current and prospective broadcasting employees in the skills of the Broadcasting industry, in addition to training the corporation's own staff and prospect ...

A beginner's guide to spatial audio in 360-degree video
by

NPR National Public Radio (NPR, stylized in all lowercase) is an American privately and state funded nonprofit media organization headquartered in Washington, D.C., with its NPR West headquarters in Culver City, California. It differs from other ...